#july2020amc1
A 25-year-old woman presents with sensory symptoms in the upper limbs and a headache that is worse on coughing. An MRI scan shows a Chiari malformation of the hindbrain and syringomyelia in the cervical spine. Which one of the following nerve tracts are most vulnerable to damage in this condition?
A. Corticospinal
B. Posterior columns
C. Spinocerebellar
D. Spinothalamic
E. Sympathetic trunks
Explanatory Notes:
A syrinx expands the centre of the spinal cord. The crossing fibres of the spinothalamic are most at risk of injury. All other fibres are further from the site of pathology.
A 25-year-old woman presents with sensory symptoms in the upper limbs and a headache that is worse on coughing. An MRI scan shows a Chiari malformation of the hindbrain and syringomyelia in the cervical spine. Which one of the following nerve tracts are most vulnerable to damage in this condition?
A. Corticospinal
B. Posterior columns
C. Spinocerebellar
D. Spinothalamic
E. Sympathetic trunks
Explanatory Notes:
A syrinx expands the centre of the spinal cord. The crossing fibres of the spinothalamic are most at risk of injury. All other fibres are further from the site of pathology.
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